Earthquake Bulletins of latest seismic events in the Philippines are listed below (last 2 hours) The event parameters (hypocenter, time and magnitude) are determined using incoming data from the Philippine National Seismic Network Philippine Standard Time (PST) is eight hours ahead of Coordinated Universal Time (UTC). (PST = UTC + 8H) UTC is the time standard for which the world regulates clocks and time. Earthquakes in this list with their date and time in blue have reported and recorded intensities. Intensity ratings are based on the PHIVOLCS Earthquake Intensity Scale.

Residents of Metro Manila and nearby provinces should prepare for the “Big One,” a magnitude 7.2 earthquake to be generated by the West Valley Fault, which is ripe for movement.

The 100-kilometer fault traverses parts of Bulacan through Quezon City, Marikina, Makati, Pasig, Taguig and Muntinlupa in Metro Manila; San Pedro, Biñan, Sta. Rosa, Cabuyao and Calamba in Laguna; and Carmona, General Mariano Alvarez and Silang in Cavite.

A 2004 study funded by the Japan International Cooperation Agency for Phivolcs and the Metropolitan Manila Development Authority showed that the magnitude 7.2 quake could kill up to 34,000 people and injure 100,000 others due to collapsed buildings.

Solidum explained that the movement of the Philippine Fault (Surigao segment) would not trigger the movement of faults farther like the West Valley Fault.

Phivolcs continued to record aftershocks from the magnitude 6.7 quake that hit Surigao last Friday night, killing at least eight people and injuring hundreds.

More than 150 aftershocks have been recorded as of yesterday morning, Phivolcs said.

At 3:51 a.m. yesterday, an aftershock of magnitude 4.1 struck Surigao. It was reportedly felt at Intensity 3 in the city.

Phivolcs earlier warned the public to brace for more aftershocks from the magnitude 6.7 quake that could collapse already damaged structures.

Eastern Mindanao, including Surigao del Norte, is one of the earthquake prone areas in the country because of the Philippine Fault and Philippine Trench.

Amid the devastation caused by the magnitude 6.7 earthquake in Surigao, the Philippine Institute of Volcanology and Seismology (Phivolcs) yesterday appealed to residents of Metro Manila and nearby provinces to prepare for a powerful earthquake that could kill thousands.

“Everyone must learn from the recent effects of the magnitude 6.7 earthquake in Surigao del Norte. If a similar event happens in a highly urbanized area, the effects can be more devastating,” Phivolcs director Renato Solidum warned.

State seismologists have repeatedly warned the public that the West Valley Fault is ripe for movement.

Monday, April 25, 2016

An earthquake is the perceptible shaking of the surface of the Earth, resulting from the sudden release of energy in the Earth's crust that creates seismic waves. Earthquakes can be violent enough to toss people around and destroy whole cities. The seismicity or seismic activity of an area refers to the frequency, type and size of earthquakes experienced over a period of time.

Earthquakes are measured using observations from seismometers. The moment magnitude is the most common scale on which earthquakes larger than approximately 5 are reported for the entire globe. The more numerous earthquakes smaller than magnitude 5 reported by national seismological observatories are measured mostly on the local magnitude scale, also referred to as the Richter magnitude scale. These two scales are numerically similar over their range of validity. Magnitude 3 or lower earthquakes are mostly imperceptible or weak and magnitude 7 and over potentially cause serious damage over larger areas, depending on their depth. The largest earthquakes in historic times have been of magnitude slightly over 9, although there is no limit to the possible magnitude. Intensity of shaking is measured on the modified Mercalli scale. The shallower an earthquake, the more damage to structures it causes, all else being equal.

At the Earth's surface, earthquakes manifest themselves by shaking and sometimes displacement of the ground. When the epicenter of a large earthquake is located offshore, the seabed may be displaced sufficiently to cause a tsunami. Earthquakes can also trigger landslides, and occasionally volcanic activity.

In its most general sense, the word earthquake is used to describe any seismic event — whether natural or caused by humans — that generates seismic waves. Earthquakes are caused mostly by rupture of geological faults, but also by other events such as volcanic activity, landslides, mine blasts, and nuclear tests. An earthquake's point of initial rupture is called its focus or hypocenter. The epicenter is the point at ground level directly above the hypocenter.

Tectonic earthquakes occur anywhere in the earth where there is sufficient stored elastic strain energy to drive fracture propagation along a fault plane. The sides of a fault move past each other smoothly and aseismically only if there are no irregularities or asperities along the fault surface that increase the frictional resistance. Most fault surfaces do have such asperities and this leads to a form of stick-slip behavior. Once the fault has locked, continued relative motion between the plates leads to increasing stress and therefore, stored strain energy in the volume around the fault surface. This continues until the stress has risen sufficiently to break through the asperity, suddenly allowing sliding over the locked portion of the fault, releasing the stored energy. This energy is released as a combination of radiated elastic strain seismic waves, frictional heating of the fault surface, and cracking of the rock, thus causing an earthquake. This process of gradual build-up of strain and stress punctuated by occasional sudden earthquake failure is referred to as the elastic-rebound theory. It is estimated that only 10 percent or less of an earthquake's total energy is radiated as seismic energy. Most of the earthquake's energy is used to power the earthquake fracture growth or is converted into heat generated by friction. Therefore, earthquakes lower the Earth's available elastic potential energy and raise its temperature, though these changes are negligible compared to the conductive and convective flow of heat out from the Earth's deep interior.

Friday, March 4, 2016

Our economic welfare is concentrated in very few highly populated areas. We experience more than 10,000 earthquakes every year. Most earthquakes are very small and do not impact us at all. But now and then there are big ones, and then every number of years there are really devastating earthquakes.. We expect a major quake will hit our beautiful country sometime in the next 10 years. In order to reduce the loss of life and protect our economic investments during an earthquake, it is essential to install advanced stand-alone warning systems.

There will be a devastating Earthquake to hit the Philippines. According to a JICA Study, there will be more than 40,000 casualties, more than 200,000 injured victims, more than 100,000 buildings and structures will be damaged and billions of pesos will be lost.

People freeze during an earthquake. They cannot take quick and essential decisions. They panic. Taking control or command is hard, if not, impossible. Immediate intervention and action is vital to prevent secondary disasters. With real-time warning systems we can automatically stop critical equipment, guide people for safety and inform public about the situation.

JPN-1052 Seismic Accelerograph continuously monitors and records ground movement. It has a Tri-Axial Servo-Type Sensor, the most advanced, most precise and most reliable sensor available in the market. The machine gives out and records real time Ground Movement Acceleration values in units of Gal, real time Modified Mercalli Seismic Intensity and SI Value - Velocity Response Spectrum.

Measuring invisible vibration. Most vibrations can't be seen by the human eye. IMV develops our own sensors to continuously measure and monitor vibrations and movements to safeguard structures, equipment, assets, investments and most importantly - people.

The machine provides immediate alarm annunciation to ensure that the building occupants can be moved to safety, it is used to set off alarms at specifed ground movement levels.

The use of this equipment eliminates unnecessary evacuation during earthquake events. It also assures people that the structure is safe and there is no need to panic.

The 10-output alarm and shut off feature can be utilized to achieve an ultra efficient and highly advanced building management. Each channel can be adjusted to have its own preset acceleration level which can trigger automatic switch off for utilities such as elevators, LPG lines, electricity ines, water lines, automatic doors, airconditioning cooling towers, etc, to prevent secondary disasters as well as take care of of your important and sensitive equipment.

The seismic monitor can also be connected to the building's BMS and FDAS. The machine can also activate pre-recorded voice commands to guide and assure tenants during emergency situations utilizing the building's Public Announcement System.

JPN-1052 Seismic Accelerograph continuously monitors and records all ground movement in relation to the structural integrity of a building, thus giving you essential, specific and actual data which a designated professional can use in his/her analysis and evaluation of the structure after any earthquake or ground movement event.

This provides faster evaluations to allow quicker decisions by stakeholders and persons-in-charge after major earthquake events.

Sunday, February 14, 2016

There will be a devastating Earthquake to hit the Philippines. According to a JICA Study, there will be more than 40,000 casualties, more than 200,000 injured victims, more than 100,000 buildings and structures will be damaged and billions of pesos will be lost.

It is not an issue of "if", but "when". The question is, if you are ready for this. The Philippines is a highly seismic country.

Our economic welfare is concentrated in very few highly populated areas. We experience more than 10,000 earthquakes every year. Most earthquakes are very small and do not impact us at all. But now and then there are big ones, and then every number of years there are really devastating earthquakes.. We expect a major quake will hit our beautiful country sometime in the next 10 years. In order to reduce the loss of life and protect our economic investments during an earthquake, it is essential to install advanced stand-alone warning systems.

People freeze during an earthquake. They cannot take quick and essential decisions. They panic. Taking control or command is hard, if not, impossible. Immediate intervention and action is vital to prevent secondary disasters. With real-time warning systems we can automatically stop critical equipment, guide people for safety and inform public about the situation.

There is an available technology to provide you with these solutions. Ask us to learn more about IMV JPN-1052 Seismic Accelerograph

JPN-1052 Seismic Accelerograph continuously monitors and records ground movement. It has a Tri-Axial Servo-Type Sensor, the most advanced, most precise and most reliable sensor available in the market. The machine gives out and records real time Ground Movement Acceleration values in units of Gal, real time Modified Mercalli Seismic Intensity and SI Value - Velocity Response Spectrum.

Measuring invisible vibration. Most vibrations can't be seen by the human eye. IMV develops our own sensors to continuously measure and monitor vibrations and movements to safeguard structures, equipment, assets, investments and most importantly - people.

The machine provides immediate alarm annunciation to ensure that the building occupants can be moved to safety, it is used to set off alarms at specifed ground movement levels.

The use of this equipment eliminates unnecessary evacuation during earthquake events. It also assures people that the structure is safe and there is no need to panic.

The 10-output alarm and shut off feature can be utilized to achieve an ultra efficient and highly advanced building management. Each channel can be adjusted to have its own preset acceleration level which can trigger automatic switch off for utilities such as elevators, LPG lines, electricity ines, water lines, automatic doors, airconditioning cooling towers, etc, to prevent secondary disasters as well as take care of of your important and sensitive equipment.

The seismic monitor can also be connected to the building's BMS and FDAS. The machine can also activate pre-recorded voice commands to guide and assure tenants during emergency situations utilizing the building's Public Announcement System.

JPN-1052 Seismic Accelerograph continuously monitors and records all ground movement in relation to the structural integrity of a building, thus giving you essential, specific and actual data which a designated professional can use in his/her analysis and evaluation of the structure after any earthquake or ground movement event.

This provides faster evaluations to allow quicker decisions by stakeholders and persons-in-charge after major earthquake events.

10-Output Alarm and Shut-Off Mechanism. Each Alarm Channel can have an individual setting or trigger level to be used to activate external alarms such as Fire Alarm Systems, Sirens, Public Announcement Systems, Building Management Systems and used to shut off Elevators, Electricity Lines, Water Lines, Fire doors, Airconditioning Cooling Towers and other important equipment. Minimizing damages to our properties and investments.

Blog Archive

PHIVOLCS Earthquake Bulletins of
latest seismic events in the Philippines are listed below. The event
parameters (hypocenter, time and magnitude) are determined using incoming
data from the
Philippine National Seismic Network
Philippine Standard Time (PST) is eight hours ahead of
Coordinated Universal Time (UTC).
(PST = UTC + 8H) UTC is the time standard for which the world regulates
clocks and time. Earthquakes in this list with their date and time
underlined in blue
have reported felt intensities. Intensity ratings are based on the
PHIVOLCS Earthquake Intensity Scale